Download the instagram videos and images easily.

insta-download.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
from datetime import datetime 
import requests
from tqdm import tqdm
import re

def download():
    url = input("Please enter the URL: ")
    x = re.match(r'^(https:)[/][/]www.([^/]+[.])*instagram.com', url)

    if x:
        request_image = requests.get(url)
        src = request_image.content.decode('utf-8')
        check_type = re.search(r'<meta name="medium" content=[\'"]?([^\'" >]+)', src)
        check_type_f = check_type.group()
        final = re.sub('<meta name="medium" content="', '', check_type_f)

        if final == "image":
                print("\nDownloading the image...")
                extract_image_link = re.search(r'meta property="og:image" content=[\'"]?([^\'" >]+)', src)
                image_link = extract_image_link.group()
                final = re.sub('meta property="og:image" content="', '', image_link)
                _response = requests.get(final).content
                file_size_request = requests.get(final, stream=True)
                file_size = int(file_size_request.headers['Content-Length'])
                block_size = 1024
                filename = datetime.strftime(datetime.now(), '%Y-%m-%d-%H-%M-%S')
                t=tqdm(total=file_size, unit='B', unit_scale=True, desc=filename, ascii=True)
                with open(filename + '.jpg', 'wb') as f:
                    for data in file_size_request.iter_content(block_size):
                        t.update(len(data))
                        f.write(data)
                t.close()
                print("Image downloaded successfully")


        if final == 'video':
            print('downloading')
            extract_video_link = re.search(r'meta property="og:video" content=[\'"]?([^\'" >]+)', src)
            video_link = extract_video_link.group()
            final = re.sub('meta property="og:video" content="', '', video_link)
            _response = requests.get(final).content
            file_size_request = requests.get(final, stream=True)
            file_size = int(file_size_request.headers['Content-Length'])
            block_size = 1024
            filename = datetime.strftime(datetime.now(), '%Y-%m-%d-%H-%M-%S')
            t=tqdm(total=file_size, unit='B', unit_scale=True, desc=filename, ascii=True)
            with open(filename + '.mp4', 'wb') as f:
                for data in file_size_request.iter_content(block_size):
                    t.update(len(data))
                    f.write(data)
            t.close()
            print("Video downloaded successfully")


while True:
    try:
        download()
        sys.exit()
    except (KeyboardInterrupt):
        print("Programme Interrupted")

Profile picture Downloading...
handy_hamper: 100%|###############################################################################################| 12.9k/12.9k [00:00<00:00, 800kB/s]
link loop started
loop link <a href= : https://www.instagram.com/p/CH2I7l5DOO_/
Unknown URL
loop link <a href= : https://www.instagram.com/p/CHEh77gjdWx/
Unknown URL
loop link <a href= : https://www.instagram.com/p/CHAK7wJnEzs/
Unknown URL
loop link <a href= : https://www.instagram.com/p/CHADKpeHY3I/
Unknown URL

I cannot say why you are getting this error. Everything is working fine on my end.

And btw there is a tool called InstaPy. Use that it will reduce you effort of getting every single link for images and stuff as you seems like to be downloading all the images from a single page.